Quantifying residual stress in Helium-implanted surfaces and its implication for blistering

Helium implantation in surfaces is of interest for plasma facing materials and other nuclear applications. Vanadium as both a representative bcc material relevant fusion applications implanted using ion beam microscope, the resulting swelling nanomechanical properties are quantified. These values put correlation to data obtained from micro residual stress measurements focused based ring-core technique. We found that measured similar literature values. Further we able measure surface caused by find it approaches yield strength at blistering doses. The simple calculations performed present work, along with several geometrical considerations deduced experimental results confirm driving force blister formation comes bulging mainly gas pressure buildup, rather than solely induced buckling.